For an arbitrary weak electrolyte with the formula undergoing partial dissociation in solution with — Solutions and Colligative Properties Chemistry Question
Question
For an arbitrary weak electrolyte with the formula $A_x B_y$ undergoing partial dissociation in solution with a degree of dissociation $\alpha$, which of the following exact mathematical relationships defines the van't Hoff factor ($i$)?
Answer: B
💡 Solution & Explanation
The general dissociation reaction yields a total number of ions $n = x + y$ per formula unit. Substituting this into the standard van't Hoff dissociation formula $i = 1 + \alpha(n - 1)$ gives exactly $i = 1 + \alpha(x + y - 1)$.
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